LED Spotlights = shimmer?

i think it everytime i read about it, but ive never said it.
high powered leds and regular 5mm and 10mm leds are not the same, they arent even close. think about the difference between little keychain led lights and a 200 dollar mc-e flashlight that is brighter than headlights (possibly exagerating here). any of the better high powered leds will have spectral graphs and exact measurments of brightness at different drive currents, also, they require heatsinking.

95% of the time, if your leds do not have some kind of heatsink attached to them, they will not have real output power, exotic stunners and panorama and those other fixtures could possibly be an exception, i personally do not know.
 
Just to derail this thread even further.

I've been seriously considering using LED's for the two 100g tanks I am currently putting together. My plan is to use a single solar tube (14") for each tank, then LED's for supplemental/evening lighting.

The problem is trying to figure out how much supplemental lighting is required coupled with a solar tube, and how much lighting is required for purely aesthetic purposes in the evening. I've read just about every thread I can find here, and a couple other sites, and those specifics still elude me.

The reason for doing all this is of course to keep maintenance costs down (I'd rather spend more up-front and save money long term) and get the healthiest environment possible at the same time. The shimmer would be a nice bonus too.
 
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